Add 'wss' for allowed schemes in NatsDsn

[swelborn]

Change Summary

Nats also supports the wss scheme, and this is failing with:

NATS_SERVER_URL="wss://nats-url" python run.py 
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/pydantic_settings/main.py", line 144, in __init__
    super().__init__(
  File "/usr/local/lib/python3.12/site-packages/pydantic/main.py", line 193, in __init__
    self.__pydantic_validator__.validate_python(data, self_instance=self)
pydantic_core._pydantic_core.ValidationError: 1 validation error for Settings
NATS_SERVER_URL
  URL scheme should be 'nats', 'tls' or 'ws' [type=url_scheme, input_value='wss://nats-url', input_type=str]
    For further information visit https://errors.pydantic.dev/2.8/v/url_scheme

Related issue number

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist -- unsure
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @sydney-runkle

[swelborn]

please review

[codspeed-hq]

CodSpeed Performance Report

Merging #10224 will not alter performance

_{Comparing swelborn:allow-wss-natsdsn (3179eb5) with main (4a70cec)}

Summary

✅ 17 untouched benchmarks

[sydney-runkle]

Looks good, please use formatting with make format (we use ruff) to ensure our linting tests pass!

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[swelborn]

please review